Floor plan design for a single-family house on a large plot with a slope location

I think, is that a slope? How is a car supposed to be parked there?

7.5% is not really a slope.

7.5% is not really a slope.

Wasn't there something about story height? Whatever...

Hello from your area. We built with architects from Wiehl in Lindlar on a slope and in Grauwacke rock. We were also quite naive with the budget and still managed it.

The question is whether we should build with a basement despite the probably existing rock.

You can have it checked whether there is rock. Only then is the question worthwhile.

Both the wishes and the budget are definitely adjustable.

That will happen too. We would also like a pool, but to carve that into the rock is disproportionately expensive. Our house is not bigger than the one you planned, but it has a larger footprint. After the first 250k, we didn’t have a basement or a foundation slab completed – well, every slope is different. Your plan is heading into seven figures. That’s okay, if it’s feasible.

Your design doesn’t do justice to the slope. It’s good if you’re sketching around; that helps form opinions. Ultimately, with that investment and complication, better have a professional do it. I’m happy to recommend our architect.

Hello from your area. We built with architects from Wiehl in Lindlar on a slope and in graywacke rock. We were also quite naive about the budget and yet managed it.

You can have it checked whether there is rock there.

Architect recommendation gladly via PM :)

We had also already thought about a soil survey in advance, but of course that only really makes sense when you know where the house is supposed to stand, or how big it will be, and you only know that again when you know whether with or without a basement. So it’s kind of a catch-22 :rolleyes: The statement of a local architect was, "the company I often build with digs a bit with the excavator and then knows" :p I somehow consider that quite unprofessional for planning a project. The local general contractor first said he didn’t need a soil survey. After the hint about the rock, he then suggested a split-level…

Somehow the attachment is missing. So here it is again.

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That's how we planned it as well. That's why I find the "incidental construction costs of >100k" posts here surprising, but you can't really get a proper estimate in advance anyway.

I would leave out the basement due to budget. Or does the existing house have a basement?

Has the demolition already taken place? Or is it included in the budget?

According to the surveyor, the demolition should cost approximately €45,000 (asbestos cement etc.), has not yet taken place and is calculated in addition to the budget. The existing house only has a small, damp potato cellar.